The Performance of Seaport Clusters - RePub - Erasmus Universiteit ...

Chapter 8 – Clustering in Seaports 99
The share of port related firms as a percentage of the total number of firms in the
municipality provides a basis to draw a - to some extent arbitrary - cluster border. Table 26
shows the concentration of port activities in the municipalities surrounding Rotterdam.
Table 26: The port cluster region in Rotterdam (based on data for 2002)
Municipality Total number of firms Cluster firms Concentration-index
Moerdijk 537 115 6.6
Rhoon/Portugaal 1,744 224 4.0
Zwijndrecht 3,214 409 4.0
Lekkerkerk/ Krimpen aan de ijssel 2,345 200 2.6
Hardinxveld Giessendam 1,629 128 2.4
Ridderkerk 3,947 290 2.3
Maasland 1,105 80 2.2
Papendrecht 2,163 146 2.1
Alblasserdam 1,343 88 2.0
Krimpen a/d Lek 1,305 79 1.9
Rozenburg 567 34 1.9
Barendrecht 3,168 185 1.8
Rotterdam 55,986 3,253 1.8
Dordrecht 9,082 525 1.8
Hendrik Ido Ambacht 1,660 93 1.7
Spijkenisse 3,424 183 1.7
Capelle a/d IJssel 5,617 235 1.3
Brielle 1,414 59 1.3
Geervliet 1,025 42 1.3
The Nederlands 1,417,506 45,656 1.0
Source: based on data from Bureau van Dijk, 2003
All municipalities with a ‘concentration index’ of 1.7 and more (bold in the table) are included
in the cluster region. Rotterdam has a relatively low concentration index, because the city
has a large number of residents and as a consequence a large number of service firms,
such as shops and restaurants. As a result, the concentration of cluster activities is less
pronounced than in other smaller municipalities.